R

650W

ON

C

1pF

(SAMPLE)

BV

DD

D

IN

BGND

AV

DD

A

IN

AGND

DiodeTurn-OnVoltage:0.35V

EquivalentDigitalInputCircuit

EquivalentAnalogInputCircuit

ADS1204

ELECTRICAL CHARACTERISTICS (continued)

CH x– = 2.5V, REFIN = REFOUT = internal +2.5V, CLKIN = 20MHz, and 16-bit Sinc

otherwise noted.

ADS1204

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

Logic family

LVCMOS

High-level input voltage

2

V

Low-level input voltage

–0.3

0.8

V

Input current

±50

nA

Input capacitance

5

pF

Logic family

LVCMOS

High-level output voltage

V

Low-level output voltage

0.2

V

Output capacitance

5

pF

Load capacitance

30

pF

Data format

Bit stream

POWER SUPPLY

Analog supply voltage

4.5

5.5

V

Low-voltage levels

2.7

3.6

V

Buffer I/O supply voltage

5V logic levels

4.5

5.5

V

CLKSEL = 1

22.5

30

mA

Analog operating supply current

CLKSEL = 0

22.4

29

mA

4

mA

Buffer I/O operating supply current

4

mA

CLKSEL = 0

122

145

mW

Power dissipation

CLKSEL = 1

112.5

150

mW

(7)

EQUIVALENT INPUT CIRCUITS

NOTE: The thermal pad is internally connected to the substrate. This pad can be connected to the analog ground or left floating. Keep the

thermal pad separate from the digital ground, if possible.

Copyright © 2003–2009, Texas Instruments Incorporated

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